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error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:21:30
   |
LL | fn one_ty<T: Debug>(t: T) -> TwoTys<T, T> {
   |                              ^^^^^^^^^^^^ generic argument `T` used twice
   |
note: for this opaque type
  --> $DIR/generic_duplicate_param_use.rs:15:21
   |
LL | type TwoTys<T, U> = impl Debug;
   |                     ^^^^^^^^^^

error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:23:5
   |
LL |     t
   |     ^
   |
note: type used multiple times
  --> $DIR/generic_duplicate_param_use.rs:15:13
   |
LL | type TwoTys<T, U> = impl Debug;
   |             ^  ^

error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:27:36
   |
LL | fn one_lifetime<'a>(t: &'a u32) -> TwoLifetimes<'a, 'a> {
   |                                    ^^^^^^^^^^^^^^^^^^^^ generic argument `'a` used twice
   |
note: for this opaque type
  --> $DIR/generic_duplicate_param_use.rs:17:29
   |
LL | type TwoLifetimes<'a, 'b> = impl Debug;
   |                             ^^^^^^^^^^

error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:29:5
   |
LL |     t
   |     ^
   |
note: lifetime used multiple times
  --> $DIR/generic_duplicate_param_use.rs:17:19
   |
LL | type TwoLifetimes<'a, 'b> = impl Debug;
   |                   ^^  ^^

error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:33:50
   |
LL | fn one_const<const N: usize>(t: *mut [u8; N]) -> TwoConsts<N, N> {
   |                                                  ^^^^^^^^^^^^^^^ generic argument `N` used twice
   |
note: for this opaque type
  --> $DIR/generic_duplicate_param_use.rs:19:50
   |
LL | type TwoConsts<const X: usize, const Y: usize> = impl Debug;
   |                                                  ^^^^^^^^^^

error: non-defining opaque type use in defining scope
  --> $DIR/generic_duplicate_param_use.rs:35:5
   |
LL |     t
   |     ^
   |
note: constant used multiple times
  --> $DIR/generic_duplicate_param_use.rs:19:16
   |
LL | type TwoConsts<const X: usize, const Y: usize> = impl Debug;
   |                ^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^

error: aborting due to 6 previous errors